Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint/idempotent/non-destructive, so the bar is lower, yet the description adds real context: the auth requirement and the warning that payment and draft delivery statuses do not imply production eligibility or county filing. That is a genuine interpretation caveat an agent would otherwise get wrong.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences, zero filler, with the core action front-loaded before the auth requirement and the status caveat. Nothing could be cut without losing information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema exists, so the description carries some burden for return semantics; it hints that statuses exist but never enumerates the fields returned. Combined with the undocumented order_id, an agent has the gist but not enough to call confidently.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The single parameter order_id has 0% schema description coverage, and the description never says what an order ID is, its format, or where to obtain one (e.g., from start_tax_sandbox). With low coverage the description must compensate, and it does not.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ("Read your own isolated Untax test order") and adds the sandbox scoping that separates it from production lookups. It does not explicitly distinguish itself from the sibling start_tax_sandbox / complete_tax_sandbox_order pair, so it stops short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

"Requires owner:sandbox sign-in" gives a precondition for use, which implies who may call it. But there is no explicit guidance on when to read versus when to complete the order (complete_tax_sandbox_order) or start one, so alternatives are left to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.